From 7th Century AD Japanese Mythology, ''Tide Jewels'' were seen as ''rewards'' given by The Sea God, Ryujin, to those whom He felt were in need. It is said that precious jewels would simply ''wash up'' on a Coast – IF One made the proper ''wish'' (and need). IF one did not receive a ''reward'' – The Sea God ''felt'' that person did not deserve it. In reality, many Scholars associate such ''Tide Jewels'' as being Oysters washing ashore with Pearls (sometimes) inside. Such ''rewards'' were indeed seen as ''wealth''.